current bounds on the number of colors: 0 -- 163 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:56 2012 Optimize a model with 56782 rows, 13902 columns and 183060 nonzeros Presolve time: 0.17s Presolved: 56782 rows, 13902 columns, 183060 nonzeros Variable types: 0 continuous, 13902 integer (13902 binary) Root relaxation: objective 0.000000e+00, 574 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (918 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:57 2012 Optimize a model with 28123 rows, 7219 columns and 90400 nonzeros Presolve time: 0.13s Presolved: 28123 rows, 7219 columns, 90400 nonzeros Variable types: 0 continuous, 7219 integer (7219 binary) Root relaxation: objective 0.000000e+00, 414 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (751 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:57 2012 Optimize a model with 14143 rows, 3959 columns and 45200 nonzeros Presolve time: 0.05s Presolved: 14143 rows, 3959 columns, 45200 nonzeros Variable types: 0 continuous, 3959 integer (3959 binary) Root relaxation: objective 0.000000e+00, 338 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (615 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:58 2012 Optimize a model with 7153 rows, 2329 columns and 22600 nonzeros Presolve time: 0.02s Presolved: 7153 rows, 2329 columns, 22600 nonzeros Variable types: 0 continuous, 2329 integer (2329 binary) Root relaxation: objective 0.000000e+00, 345 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (637 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:58 2012 Optimize a model with 3658 rows, 1514 columns and 11300 nonzeros Presolve time: 0.01s Presolved: 3658 rows, 1514 columns, 11300 nonzeros Variable types: 0 continuous, 1514 integer (1514 binary) Root relaxation: objective 0.000000e+00, 358 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 14 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2675 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:58 2012 Optimize a model with 1561 rows, 1025 columns and 4520 nonzeros Presolve removed 163 rows and 163 columns Presolve time: 0.00s Presolved: 1398 rows, 862 columns, 4194 nonzeros Variable types: 0 continuous, 862 integer (862 binary) Root relaxation: objective 0.000000e+00, 169 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 163 - 0.00000 - - 0s Explored 0 nodes (707 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:58 2012 Optimize a model with 2260 rows, 1188 columns and 6780 nonzeros Presolve time: 0.01s Presolved: 2260 rows, 1188 columns, 6780 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Root relaxation: objective 0.000000e+00, 365 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 423 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 29 Zero half: 319 Explored 0 nodes (6456 simplex iterations) in 0.74 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:46:59 2012 Optimize a model with 2959 rows, 1351 columns and 9040 nonzeros Presolve time: 0.01s Presolved: 2959 rows, 1351 columns, 9040 nonzeros Variable types: 0 continuous, 1351 integer (1351 binary) Root relaxation: objective 0.000000e+00, 353 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 0 0.00000 0 294 - 0.00000 - - 1s 0 2 0.00000 0 294 - 0.00000 - - 2s 611 64 0.00000 20 286 - 0.00000 - 79.1 5s 619 70 0.00000 20 339 - 0.00000 - 78.1 11s 624 73 0.00000 10 308 - 0.00000 - 77.4 15s 1004 104 0.00000 25 321 - 0.00000 - 151 20s 1551 137 0.00000 30 264 - 0.00000 - 159 25s 2111 165 infeasible 35 - 0.00000 - 162 30s 2657 237 infeasible 29 - 0.00000 - 163 35s 3218 254 infeasible 29 - 0.00000 - 163 40s 3751 267 infeasible 30 - 0.00000 - 165 45s 4324 280 0.00000 32 274 - 0.00000 - 166 50s 4870 260 infeasible 32 - 0.00000 - 167 55s 5423 265 infeasible 34 - 0.00000 - 167 60s 5975 259 infeasible 32 - 0.00000 - 167 65s 6526 236 0.00000 35 274 - 0.00000 - 168 70s 7092 250 infeasible 33 - 0.00000 - 168 75s * 7100 4 31 0.0000000 0.00000 0.0% 168 75s Cutting planes: Zero half: 9 Explored 7101 nodes (1209609 simplex iterations) in 75.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 4